Pump



Patented Apra- 8, 192d.

PATENT QFFICE.

RICHARD MOBIRI, OF MINNEAPOLIS, MINNESOTA.

PUMF.

Application filed October 80, 1922. Serial Nb. 597,928.

To all whom it may concern. I

Be it known that I, Rrormnn MoHR, a citizen of the United States,resident of Minneapolis, county of Hennepin, and State a of Minnesota,have invented certain new and useful Improvements in Pumps, of which thefollowing is a specification.

This invention relates to improvements in pumps, and more particularlyrelates to such pumps commonly known as the doubleacting type, havingtwo pistons operating alternately in one pipe or cylinder. I

The object of this invention is to provide a pump capable of :producinga con- 16 stant and even flow of water or liquid, such flow beinsubstantially uniform in volume. A furt er object is to provide a pumpof very simple and inexpensive construction, so designed as to eliminatethe strain on the operating means, usually caused in the ordinary pumpconstruction, where'it is necessary to start the water from rest at eachstroke of the pistons or plungers.

Other objects of the invention wil more fully appear from the followingdetailed description and the accompanying drawings and will be pointedout in the annexed claims.

In the drawings, there has been disclosed a structure designed to carryout the objects of the invention, but it is to be understood that theinvention is not confined to the exact features shown, as variouschanges maybe made within the scope of the claims which "follow.

In the drawings: g Figure 1 is a view in side elevation of a pumpembodying my invention; I

Figure 2 is a sectional view on the line 22 of Figure 1;

' Figure 3is a view in cross-section on the line 3-3 of Figure 1; I v

Figure 4 is a diagrammatic view illustrating the operation of theoperating arms; Figure 5 is a view similar to Figure a. Broadly, theidea is to provide a pump having a pair of operating arms pivotallymounted upon an upright standard or bracket, one end of each arm beingconnected to one of the piston. rods of the pump, while the other end ofeach arm is connected to a crank shaft by means of connecting links. Theoperation of these arms is such that when each piston reaches the bottomof its stroke and starts upwardly, the other piston will still be on itsupward stroke, thus providing means whereby the two pistons will moveupwardly simultaneously a certain distance of each stroke.

In the selected embodiment of the invention here shown, there isillustrated a pump comprising an upright standard or bracket 7 havingahorizontal flange Send a Water or fluid chamber 9, preferably integrallyformed therewith. A drop pipe 11 is con-- nected to' the bottom of thechamber 9, preferably, by means of .a plate 12 secured to the undersideof the horizontal flange 8. (filgure 2.) "The water or liquid is pumpedt rough this pipe to the chamber 9 by means of the piston or pump rods13 and 14, reciprocall mounted therein. These piston rods are 0 usualconstruction, the rod 13 being hollow to receive the rod '14 therein,and the lower ends of said rods being secured to' the usual valveoperated plungers or pistons, ordinarily employed in the construction ofthe usual reciprocating pumps. A discharge pipe 15 is secured to the topwall of the chamber 9 adapted to receive the liquid from the chamber.This pipe may be connected to a storage tank or any other suitablereceiving means as desired.

A suitable stufiin'g box 16 is providedin the top wall of thewaterchamber to provide a water-ti ht guide bearing for the pump rod 13,sh ably mounted therein. A similar stulling box 17 is provided at theupper terminal end of the rod 13 to provide a similar bearing for therod 14. e0 Qpposed operatingarms or levers 18 and 19 are pivotallymounted upon a short shaft 21, secured to the standard 7. The terminalends of these arms are pivotally connected to the pump rods 13 and 14 bymeans of as suitable pins 22, connecting links 23, and pivot blocks 24and 2'5, adjustably mounted upon the rods 13} and 14; by means ofsuitable lock nuts 26 and 2'2 received in thread ed engagement thereon.Suitable arms 28 inc and 29, integral with the hubs of the arms 18 and19, are provided and have their ter per andlowermostpositions.

minal ends pivotally connected to suitable connecting links 31 and 32,by means of pivot pins or bolts 33. I prefer to have the pivots 22 and33 in alignment with the-center of the shaft 21, as shown in Figures 1,-4, and 5. a

As is shown in Figure 3 the upper end of the link 31 is preferablyconnected to a gear wheel 34 by means of a suitable crank pin 35securedthereto. This ar wheel is secured to a shaft 36, rotatab ymounted in a suitable bearing 37, preferably integral with the upperportion of the standard 7. A'suitable crank arm 38 is preferably securedto the other end of the shaft 36, and has mounted thereon, a crank 'n39, adapted to receive the upper end 0 the connecting link 32. The crankpins 35 and 39 are spaced 180 degrees apart or diametrically opposite.

' A suitable pinion ,41 is secured to one end of a drive shaft 12,rotatably mounted in a suitable bearing, provided in the standard 7 andis adapted to enga e the teeth of the gear wheel 34, as shown in%igure 1. A suitable drive pulle 43 is secured to the opposite end of thesha 42, adapted to receive a flexible belt b meansof-which the devicemay be operate .-A to su port t said 7 by means of an arm 45, preferablyintegrally formed therewith.

Operation. The operation of this device may be explained 1n thefollowing manner, with reference to the" diagrammatic illustrationsshown in Figures 4 and 5,wherein theoperating arms and links are shownin their rele upper on of the pump rod-14,

ative positions, assumed at each stroke of the pump rods 13 and-14.. v

'In-the above figures, theji'magina lines B-B and (i -C representthelposition assumed by the connecting links 531 and 32 when the pumprods a're'in their extreme up- In Figure 4;, the, centerline'ofthe link32 is shown coinciding with the imaginary line BB, in which position thearm .19 will be in its uppermost positiomshown in full lines. In thissame "figure, the i'pivot in 35 is shown as having moved from the ins COto the line As soon as thein 35 leaves the line (3-C, the" arm 28 wicom- .mence to move downwardly, causing the arm 18 to move upwardlyfromthe dottedto the fullline position, as indicated,- before the arm 19commences its downstroke, thus causing both of the arms 18 and 19 tomove upwardly simultaneously a certain distance of the stroke. a

In Figure 5, the center line ithe link 31 is shown coinciding with theimaginary line M, and the arm 18 is shown in its loweride bearing 44 isalso provided rearing being secured to the standard ard links connectingmost position. In this figure it will be noted that the pivot pin 39 isalso positioned on the imaginary line GC, and that the arm 19 is stillin its upward movement, its extreme upper position being shown by dottedlines. As the crank pins 35 and 39 continue to rotate, the arm 18 willcommence to move upwardly before the arm 19 reaches its upper mostposition, thus causing the arms 18 and 19 to again move upwardly at.thesame time a predetermined distance of the stroke.

1 This simultaneous upward movement of the arms 18 and 19 and the pumprods 13 and 14, is suflicient to cause the water or other liquid beingpumped, to flow from the pump in anunbroken and substantially uniformstream, thus eliminating the objectional pulsating torque frequent inpumps of ordinary construction.

I claim as my invention:

'1. A pump operating mechanism comprising a standard having oppositelydisposed arms, a journal bearing in one arm and a journal therein havingon one end a gear .wheel and on the other end a'crank, levers the firstpump rod, and links connecting said pump rods with the ends of thelevers.

2. ump operating mechanism comprising a base, a standard ,on the base,said standard having oppositely disposed arms, a pinion near the top ofthe standard, a gear wheel journaled on one arm of the standard and inmesh with said inion, a crank, levers pivoted on opposite si es of thestandthe ends of the levers wit said gear whee and crank respectively,the other ends of the levers extending on the other side of the standardand to approximately a vertical line from the end of the other arm ofthe standard, a pump rod bearing in said last mentioned standard arm, apump rod extending therethrough, a second pump rod in proximity to thefirst and links connecting said pump rods with the ends of the levers.

3. Pump operating mechanism comprising a standard having oppositelydisposed arm s,a journal bearing in one arm, a yournalin said bearmhavingattached thereto vat one end a cra and at thepther end a gearwheel, said gear wheel having thereon apivot, a link attached to thepivot, a second PIVOt on the crank arm, a link attached reserve advanceof the link attached to the gear whereby when said operating mechanismis wheel, the other arm of the standard having in operation both rodswill move upwardly a bearing therein, a pump rod passing together for ashort distance. w

through said bearing, a second pump rod In Witness whereof, I havehereunto set 5 surrounding the first mentioned pump rod, my hand this26th day of October, 1922.

links connected to the pump rods and to the ends of the levers pivotedon said standards RICHARD MOHR.

